Volume, menu, message, speaker, headset, contacts, and call log buttons
Built-in two port Ethernet switch for connection to LAN and collocated PC
Supports wideband audio codec
Supports up to 3 SBM 24-Button Modules for expansion
2 adapter interfaces for add-on support (e.g. 9600 Bluetooth Adapter, 9600 GigE Adapter, etc.)
Built-in headset interface